The MFN2 V705I Variant Is Not a Disease-Causing Mutation: A Segregation Analysis in a CMT2 Family

Journal of Neurodegenerative Diseases
Obaid M AlbulymGarth A Nicholson

Abstract

Charcot-Marie-Tooth (CMT) disease is a clinically and genetically heterogeneous group of disorders affecting both motor and sensory neurons in the peripheral nervous system. Mutations in the MFN2 gene cause an axonal form of CMT, CMT2A. The V705I variant in MFN2 has been previously reported as a disease-causing mutation in families with CMT2. We identified an affected index patient from an Australian multigenerational family with the V705I variant. Segregation analysis showed that the V705I variant did not segregate with the disease phenotype and was present in control individuals with an allele frequency of 4.4%. We, therefore, propose that the V705I variant is a polymorphism and not a disease-causing mutation as previously reported.

References

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Oct 15, 2009·Journal of Biomedicine & Biotechnology·Isabel BanchsVictor Volpini

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Citations

Dec 15, 2015·Annals of Neurology·Obaid M AlbulymGarth A Nicholson

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Methods Mentioned

BETA
PCR
Light Scanner
genotyping

Software Mentioned

SeqMan II
Light Scanner Call - IT

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